JP5969703B2 - Small base station for mobile communication system - Google Patents

Description

  The present invention relates to a base station of a mobile communication system, and more particularly to a miniaturized base station installed in a building or at home.

  A base station in a mobile communication system is a system that relays radio waves of a mobile terminal in a cell. The base station is provided mainly on the roof of a building and relays the radio waves of the mobile terminal. Therefore, there are base stations in cell units, and such base stations perform transmission / reception of incoming / outgoing signals, designation of call channels, call channel monitoring, etc. in addition to interface functions between portable terminals and switching stations. Control.

  In addition, antennas employed in base stations have been widely used with the advantage that there are many control antennas capable of beam tilting vertically or horizontally.

  Furthermore, a small base station is currently provided that covers an area much smaller than the radius of an existing mobile communication service and that reduces frequency load and improves call quality. Such a base station system is used to absorb data traffic concentrated in a small area. A small base station will be provided, and it will be possible to install a small base station in a building or at home, and the shadow area will be eliminated, and a more sophisticated network and convergence service will be possible.

  However, the miniaturized base station employed in the conventional mobile communication system is configured by stacking upper and lower important components such as a main board, a power supply unit, an antenna, and a power amplification unit. However, there is a limit to reducing the overall size.

  In particular, in a conventional small base station, the main board and the power amplifying unit are configured on one board, and the size of the main board is large as a whole.

  Accordingly, an object of the present invention is to provide a small base station of a mobile communication system that is advantageous for miniaturization by arranging important components three-dimensionally at appropriate positions with important parts as the center of a box.

  Another object of the present invention is to provide a small base station of a mobile communication system in which heat generation problems are minimized by disposing the power supply amplifying units farthest apart from each other. It is in.

  In order to solve the above problems, the present invention is provided on any one of a polyhedron-shaped box, an antenna part provided on the widest surface of the outer surface of the box, and an outer surface of the box. The first board and the first board are arranged in an upright state, and at least two or more of the first boards are arranged to face at least three or more external side surfaces provided in the box. Including board.

  In addition, the box according to the present invention includes the first and second external side surfaces facing each other, and the third and fourth external side surfaces disposed opposite to each other and between the first and second external side surfaces. And at least three internal walls are provided inside the surface on which the antenna unit is provided.

  In addition, the board according to the present invention faces the first and second external side surfaces, and is arranged in parallel with the second and third boards arranged parallel to each other, and the third external side surface. And a fourth board.

  The first board according to the present invention is a digital interface module, the second and third boards are first and second power amplifiers, respectively, and the fourth board is an up / down converter. .

  Further, the power supply unit is arranged in parallel on the fourth external side surface according to the present invention, and is arranged upright with the first board.

  The antenna unit according to the present invention includes an antenna and an antenna transmission / reception module arranged so as to be laminated with the antenna.

  In addition, the inner wall according to the present invention serves as a reflector of the antenna unit.

  The box according to the present invention is a filter section.

  In addition, the filter unit according to the present invention is coupled so that at least two filters face each other.

  In addition, the first to fourth boards and the power supply unit according to the present invention are arranged so as to surround the entire outer surface of the box.

  As described above, the present invention is arranged such that the digital interface module and the antenna unit are stacked in the Z-axis direction, and the first and second power amplifiers, the up / down converter, and the power supply unit are X Miniaturization is achieved by being arranged along the axis and the Y axis. In particular, the present invention is not limited to the arrangement of a plurality of boards stacked one above the other, but can be arranged considering the heat generation problem in three dimensions along the outer surface of the box. Can be implemented efficiently in space.

It is a perspective view which shows the external appearance of the small base station by this invention. FIG. 3 is an exploded perspective view showing a configuration of a small base station according to the present invention. It is a perspective view which shows the box in which the antenna part of the small base station by this invention was mounted, and is a figure which shows the state from which the antenna of the antenna part was removed. It is sectional drawing which shows the box in which the antenna part of the small base station by this invention was mounted. It is a top view which shows the box in which the antenna part of the small base station by this invention was mounted, and is a figure which shows the state from which the antenna of the antenna part was removed. 1 is a perspective view showing an antenna of a small base station according to the present invention.

  The present invention provides a polyhedral box, an antenna portion provided on the widest surface of the outer surface of the box, a first board provided on any one of the outer surfaces of the box, And at least two or more boards each arranged in an upright state and arranged to face at least three or more external side surfaces provided in the box.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. The same reference numerals indicate the same components.

  In describing the small base station according to the present invention, the orthogonal coordinate system shown in FIGS. 1 and 2 is used, but the X axis indicates the horizontal direction, the Y axis indicates the vertical direction, and the Z axis indicates the vertical direction. Indicates.

  The base station 10 according to the present invention is reduced in size by reducing the horizontal size, vertical size, and vertical size as compared with the conventional one, but maintains the existing base station performance. That is, the downsizing indicates that the overall size is reduced along the three axes compared to the conventional one.

  FIG. 1 shows an appearance of a small base station (10; hereinafter referred to as a base station) according to the present invention. FIG. 1 shows an external appearance of the base station 10 in a fully assembled state in which the outer cover 11 and the heat sink 12 are combined. The heat sink 12 is disposed on the bottom of the base station 10 and supports important components mounted therein, and the outer cover 11 is coupled to the heat sink in the Z-axis direction to protect the internal important components.

  FIG. 2 is an exploded perspective view showing the configuration of the base station 10 according to the present invention. As shown in FIG. 2, the base station 10 has an antenna unit 15 (antenna unit), at least three boards B1 to B4 (printed circuit boards), and a power supply unit with a box 13 as a center. 14 (PSU; Power Supply Unit) and a heat sink 12 (heat sink) are three-dimensionally arranged at an appropriate position. The above-mentioned “three-dimensional arrangement” of a plurality of boards does not mean that the boards are stacked around one axis, but is important in consideration of three axes including the X, Y, and Z axes. This means that the components are arranged, in particular, that a plurality of different boards are arranged upright along the X and Y axes, and the remaining important components are arranged along the Z axis. In addition, such a three-dimensional arrangement makes the base station according to the present invention very advantageous for miniaturization. In addition, the base station 10 of the present invention considers heat generation problems in addition to the three-dimensional arrangement of important components.

  The box 13 has a polyhedral shape, for example, a rectangular parallelepiped shape, and has a plurality of external surfaces and internal walls, and the antenna unit 15 is accommodated in the internal space. In particular, the box 13 has a box shape in which an upper stage is opened, and includes at least three or more inner walls 136, and at least three or more outer side surfaces 131 to 134 and a bottom surface 135. The external surface includes at least three or more external side surfaces 131 to 134 and a bottom surface 135. The inner wall has at least three or more inner walls. 2 and 3, four inner walls 136 and four outer side surfaces 131 to 134 are shown. The outer surface and the inner wall are each configured with the same shape and size.

  The plurality of external surfaces include first and second external side surfaces 131 and 132 facing each other, and third and fourth external side surfaces 133 and 134 facing each other between the first and second external side surfaces 131 and 132. Respectively. The first and second outer side surfaces 131 and 132 are parallel to each other, and the third and fourth outer side surfaces 133 and 134 are parallel to each other. The first outer side surface 131 is perpendicular to the third and fourth outer side surfaces 133, 134, and the second outer side surface 132 is relative to the third and fourth outer side surfaces 133, 134. It is vertical. In addition, the first to fourth outer side surfaces 131 to 134 have a flat shape. Further, since the box has a rectangular parallelepiped shape, the first to fourth outer side surfaces 131 to 134 have a rectangular shape.

  The box 13 includes a plurality of external surfaces, and from the viewpoint of the shape of the external surface, among the external surfaces, the first external side surface 131 and the second external side surface 132 are the same rectangle or the same square. The third outer side surface 133 and the fourth outer side surface 134 may be formed of the same rectangle or the same square, and the bottom surface 135 may be formed of a rectangle or a square.

  In addition, from the viewpoint of the size (width) of the external surface, the first and second external side surfaces 131 and 132 and the third and fourth external side surfaces 133 and 134 are configured by rectangles having the same size or different sizes. It may be made up of squares of the same size.

  Of the external surfaces, the bottom surface 135 positioned at the bottom may be configured as a rectangle or a square. From the first and second external side surfaces 131 and 132 and the third and fourth external side surfaces 133 and 134, It may be large, small or configured in the same shape. The box 13 according to the present invention preferably has a bottom surface 135 wider than the first and second outer side surfaces 131 and 132 and the third and fourth outer side surfaces 133 and 134. FIG. 2 shows that the bottom surface 135 is wider than the first and second outer side surfaces 131 and 132 and the third and fourth outer side surfaces 133 and 134. It is preferable that the bottom surface 135 is configured to be the widest and the antenna unit 15 is disposed.

  Specifically, the arrangement of the board attached to the outer surface of the box 13 will be described.

  A plurality of boards B1 to B4 and a power supply unit 14 are arranged on the outer surface of the box 13. The plurality of boards include first to fourth boards B1 to B4. The first board B <b> 1 is disposed on the bottom surface 135 of the box 13. The second and third boards B <b> 2 and B <b> 3 are disposed on the first and second outer side surfaces 131 and 132 of the box 13. The fourth board B4 is disposed on the third outer side surface 133. The power supply unit 14 is disposed on the fourth outer side surface 134.

  The first board B1 is a digital interface module, and is arranged in parallel with facing the box bottom surface 135. The second board B <b> 2 is a first power amplifier (PAM) and is arranged in parallel in a state of facing the first external side surface 131. The third board B3 is a second power amplifier (PAM) and is arranged in parallel in a state of facing the second external side surface 132. The fourth board B4 is an up / down converter, and is arranged in parallel in a state of facing the third outer side surface 133. The power supply unit 14 is arranged in parallel in a state of facing the fourth outer side surface 134.

  As described above, the first to fourth boards B1 to B4 and the power supply unit 14 are substantially substantially plate-shaped, and the outer surface of the box is specifically flat first. The fourth outer side surfaces 131 to 134 and the bottom surface 135 can be arranged so as to have a gap or be in close contact with each other. The first and second power amplifiers B2 and B3 face each other and are parallel to each other. The up / down capacitor B4 and the power supply unit 14 are opposed to each other and are parallel to each other.

  The first and second power amplifiers B2 and B3 are arranged in a state of being separated from each other with respect to the box 13 in consideration of heat generation efficiency. That is, in the first and second power amplifiers B2 and B3, power amplifying elements (not shown) are arranged in consideration of heat generation problems. In other words, when there are a plurality of power amplifiers B2 and B3, it is most effective for heat generation to arrange them so as to have the most separated distance from each other. When the box 13 is a rectangular parallelepiped as shown in the figure, it is preferable to arrange the boxes 13 so as to face each other, and even when the shapes of the box 13 are variously implemented, the power supply amplifying units are most separated from each other. Most preferably it is located at a certain distance.

  In addition, by configuring the power amplifier section on one board, it is possible for those skilled in the art to configure the power amplifier section by dividing it into two parts in consideration of the heat generation problem.

  In addition, although the first and second power amplifiers B2 and B3 are disposed on the first and second outer side surfaces 131 and 132 as an example, the third and fourth outer side surfaces 133 and 134 are illustrated. It is also possible to arrange them. In addition, the up / down converter B4 and the power supply unit 14 are configured on the third and fourth external side surfaces 133 and 134, but the first and second power amplifiers B2 and B3 are the third and fourth. When disposed on the outer side surfaces 133 and 134, the first and second outer side surfaces 131 and 132 can be disposed. The up / down capacitor B4 and the power supply unit 14 face each other and maintain a separated state. Also, the first power amplifier B2 faces the digital interface module B1, the up / down converter B4 and the power supply 14 in the vertical direction, and the second power amplifier B3 is up with the digital interface module B1. / The down converter B4 and the power supply 14 are directed in the direction perpendicular to each other.

  Further, when looking at a plurality of board arrangement states of the base station, the second to fourth boards are arranged upright along the outer periphery on the edge side of the first board.

  Referring to FIGS. 3 to 6, the antenna unit 15 is disposed inside the box 13. The antenna unit 15 includes an antenna 150, an antenna transmission / reception module, a reflection plate 151, a ground plate 152, and a plurality of radiating elements 153. The ground plate 152 and the radiating element 153 are electrically connected to transmit a radiation signal. The radiating element 153 includes a plurality of radiating elements, each having a radiating pattern portion. The radiation pattern may be realized in a square shape, a circular shape, a square ring shape, or the like.

  As shown in FIG. 4, when the antenna unit 15 is disposed in the box 13, the four inner walls 136 of the box perform an antenna reflector function.

  The box 13 corresponds to a filter unit in the base station apparatus. In the present embodiment, the box 13 has a rectangular parallelepiped shape, and the filter having a cavity therein is described as an example, or the present invention is not limited thereto. The filter unit is coupled so that at least two filters are opposed to each other.

  When the box 13 has a rectangular parallelepiped shape as described above, it is preferable to arrange the antenna unit 15 on the widest surface side among the six outer surfaces. That is, in the permitted area, the wider the reflector 151 of the antenna unit 15 is, the more useful it is to improve the RF characteristics. Therefore, it is preferable to install it on the widest surface as shown in the drawing.

  When the arrangement state of the important elements inside the base station according to the present invention is described, the electrical connection configuration and the connection structure between the important elements inside are omitted. For example, a cable may be used for the electrical connection configuration, and a connector connection terminal or the like may be used for the connection structure, for example.

  The present invention is arranged such that the digital interface module and the antenna unit are stacked in the Z-axis direction, and the first and second power amplifiers, the up / down converter and the power supply unit are arranged on the X axis and the Y axis. By being arranged along, it achieves miniaturization. In particular, according to the present invention, it is possible to arrange in consideration of heat generation problems three-dimensionally along the outer surface of the box without arranging a plurality of boards stacked one above the other, and can be efficiently mounted in a limited space. it can.

10 base station 11 external cover 12 heat sink 13 box 14 power supply unit 15 antenna unit 131 first external side surface 132 second external side surface 133 third external side surface 134 fourth external side surface 135 bottom surface 136 internal wall 150 antenna 151 Reflector 152 Ground plate 153 Radiating element

Claims (10)

A base station for a mobile communication system,
A polyhedral box,
An antenna portion provided on the widest surface of the outer surface of the box;
A first board disposed on any one of the outer surfaces of the box;
Including at least two or more boards arranged in an upright state with each of the first boards and arranged to face at least three or more external side surfaces provided on the box. Feature base station. The box is
First and second external sides facing each other;
And third and fourth external sides facing each other and disposed between the first and second external sides,
The base station according to claim 1, wherein at least three or more internal walls are provided inside the surface on which the antenna unit is provided. The board
Second and third boards respectively facing and parallel to the first and second external sides;
The base station according to claim 2, further comprising a fourth board that faces the third outer side surface and is arranged in parallel. The first board is a digital interface module;
The second and third boards are first and second power amplifiers, respectively.
The base station according to claim 3, wherein the fourth board is an up / down converter.   The base station according to claim 3, wherein a power supply unit is disposed in parallel with the fourth external side surface and is disposed upright with the first board.   The base station according to claim 2, wherein the antenna unit includes an antenna and an antenna transmission / reception module arranged to be stacked with the antenna.   The base station according to claim 6, wherein the inner wall serves as a reflector of the antenna unit.   The base station according to claim 1, wherein the box is a filter unit.   The base station according to claim 8, wherein the filter unit is configured such that at least two or more filters are coupled to face each other.   The base station according to any one of claims 3 to 5, wherein the first to fourth boards and the power supply unit are arranged so as to surround the entire outer surface of the box.

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